* FTSEurofirst 300 flat after Thursday's sharp drop
* BP gains 3 pct after leaking well capped
* Banking stocks under pressure ahead of BofA, Citi results
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By Blaise Robinson
PARIS, July 16 (Reuters) - European stocks were flat on Friday morning, erasing early gains as banking stocks drifted lower while investors braced for results from bellwethers Bank of America <BAC.N> and Citigroup <C.N>.
Oil major BP <BP.L> rose 3 percent after saying it has capped its leaking well in the Gulf of Mexico.
At 0840 GMT, the FTSEurofirst 300 <
> index of top European shares was flat at 1,034.02 points, on track to record a weekly gain of more than 1 percent.BP, whose stock had been hammered since the oil spill started in mid-April, said late on Thursday it had stopped the leak with a containment cap installed three days earlier. [
]"The cap was always going to create a knee-jerk reaction this morning. However, other issues need to be addressed as to how much will the spill cost the firm and the litigation cases that will go on for years and the damage done to the firm's name," a trader said.
"Asset disposals/stake purchase are issues that will keep the shares active but until these issues are resolved, BP is not quite out of the woods just yet. Management issues, too, could create uncertainty. However, as brokers turn positive the momentum will turn. Absolute downside is limited."
In spite of Friday's rally, the stock is still down 37 percent since the spill started in mid-April.
Banking stocks lost ground, with Banco Popolare <BAPO.MI> down 1 percent and Credit Agricole <CAGR.PA> down 0.3 percent after both stocks starting the session in positive territory, as investors braced for earnings from Bank of America and Citigroup, eager to see if they will confirm the positive trend in the sector signalled by JPMorgan's <JPM.N> results on Thursday.
"The earnings season is off to a very good start, but the big question remains: how bad will be the slowdown in the second half? Until we get a clear answer, the market will be prone to big swings like the ones we've seen over the past 20 days," said Philippe Gijsels, senior equity strategist at Fortis Bank, in Brussels.
NO CATASTROPHES EXPECTED
Banking stocks, which feature among the top losers in Europe so far this year, were also under pressure ahead of the publication of stress test results next week.
Jean-Claude Juncker, the chairman of euro zone finance ministers, said on Friday the stress tests on the European banks should not reveal any "catastrophes" but the reviews should be tough.
"I am not expecting any big catastrophes," he told Austrian newspaper Kurier. "But there cannot be any glossing over, the tests are based on reality."
Goldman Sachs analysts think the results will be positive for the sector, as they will likely bring pressure to consolidate smaller, more fragile institutions, while reaffirming the strength of large listed banks, including the major Spanish financial institutions.
"We do not expect large listed European banks to raise equity as a result of the stress tests," they wrote in a note.
Around Europe, UK's FTSE 100 index <
> was up 0.2 percent, Germany's DAX index < > up 0.1 percent, and France's CAC 40 < > up 0.1 percent.Investors were also bracing for earnings from General Electric Co <GE.N>, seen as a harbinger for the global economy.
The conglomerate is expected to break a nine-quarter streak of earnings declines on Friday, but investors' focus will be on what the company has to say about its prospects over the next few quarters.
Also on the earnings front, France's Carrefour <CARR.PA>, the world's second largest retailer, was down 1 percent as investors digested a quarterly sales release that offered a mixed bag of news.
"With a lot still to deliver, and similar earnings growth available at Tesco <TSCO.L>, we remain sellers," Execution Noble analysts wrote in a note.
The FTSEurofirst 300 <
>, which lost 1.1 percent on Thursday, is down 7.1 percent since reaching a peak in April, when fears over the euro zone debt crisis escalated. (Reporting by Blaise Robinson; editing by Simon Jessop)